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README.adoc
= Cross Chain Awareness
[.readme-notice]
NOTE: This document is better viewed at https://docs.openzeppelin.com/contracts/api/crosschain
This directory provides building blocks to improve cross-chain awareness of smart contracts.
- {CrossChainEnabled} is an abstraction that contains accessors and modifiers to control the execution flow when receiving cross-chain messages.
== CrossChainEnabled specializations
The following specializations of {CrossChainEnabled} provide implementations of the {CrossChainEnabled} abstraction for specific bridges. This can be used to complex cross-chain aware components such as {AccessControlCrossChain}.
{{CrossChainEnabledAMB}}
{{CrossChainEnabledArbitrumL1}}
{{CrossChainEnabledArbitrumL2}}
{{CrossChainEnabledOptimism}}
{{CrossChainEnabledPolygonChild}}
== Libraries for cross-chain
In addition to the {CrossChainEnabled} abstraction, cross-chain awareness is also available through libraries. These libraries can be used to build complex designs such as contracts with the ability to interact with multiple bridges.
{{LibAMB}}
{{LibArbitrumL1}}
{{LibArbitrumL2}}
{{LibOptimism}}